| 摘要 |
FIELD: pipeline systems; shutting off inner space of pipelines for major repairs. SUBSTANCE: sleeve has radial holes for accommodating locking pins. In transportation position locking pins couple housing bore with sleeve, support levers and fixing shoes. When device is fixed in pipeline, sleeve is linematically coupled with groove on rod by means of locking pins. EFFECT: improved reliability of transportation owing to prevention of spontaneous wedging of device in pipeline by liquid flow. 1 cl, 2 dwg |
